Title:Investigation into the Optical and Physical Features of ZnO Nanoparticles Produced on Different Substrates
Volume: 22
Issue: 1
Author(s): Siluval Raju Mary Jony*, Subramanian Muruganantham, Ravinder Kumar and Sengotaiyan Shanmugan*
Affiliation:
- Department of Physics, Pavendar Bharathidasan College of Arts and Science, Mathur, Affiliated to Bharathidasan
University, Tiruchirappalli, Tamil Nadu, 620024, India
- Research Centre for Solar
Energy, Department of Integrated Research and Discovery and Department of Engineering Physics, College of Engineering,
Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur, 522502, Andhra Pradesh,
India
Keywords:
ZnO-composites nanoparticles, SEM, TEM, optical and physical properties, biosensors, lipid peroxidation.
Abstract:
Introduction: This study aimed to investigate the structural alterations of nanoparticles
due to external forces. These forces, both direct and indirect, are crucial in changing the
structures and characteristics of nanoparticles, which may have an impact on important variables
and results.
Methods: The main focus of this study was on how researchers might modify the characteristics
of nanoparticles by using a simple technique and adding precursor chemicals. The employed
methodology, referred to as the simple bath method, made it easier to prepare and characterize
composite nanoparticles using high-resolution TEM, XRD, SEM, and UV. To obtain important
information, a comparative examination was carried out against standard market combinations.
Results: This study explored the size and shape fluctuations of nanoparticles as identified by
XRD and SEM investigations. Using Tauc plots for UV-vis spectroscopy, the refractive indices
of the nanoparticles were calculated, and energy gaps, extinction coefficients, and dielectric
constants were visualized. Moreover, ZnO nanoparticles were tested against Gram-positive (S
pneumonia, Bacillus subtilis, and Bacillus megaterium) and Gram-negative (Klebsiella
pneumonia, Shigella dysenteriae, ‘E-coli’) bacteria using an agar well diffusion process. Region
reserve values (mm) were measured after twenty-four hours at thirty-seven degrees Celsius.
Conclusion: The common antibiotic amoxicillin (10 μg/disc) was used as a standard. The activity
of IN, ISB, ISC, and ISN on bacteria and fungi was examined. It was found that ZnO nanoparticles
exhibited antibacterial capabilities, such as ion release and rupture, as well as the generation
of antibacterial properties of IN, ISB, ISC, and ISN. IN, where ZnO nanoparticles alone
were evaluated directly to establish baseline activity; ISB, where Lawsonia inermis (henna)
extract was combined with ZnO nanoparticles in a Petri dish under different substrates and conditions;
ISC, where Lawsonia inermis extract with ZnO nanoparticles was combined in a concave
dish and tested under varying substrates and conditions; and ISN, where Lawsonia inermis
extract with ZnO nanoparticles was further doped with NaOH.
